Coupling clamp and a method of manufacture therefor
AssigneeNacam
InventorBernard Haldric
Life of this patent
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Abstract
The present invention relates to coupling clamps formed from a sheet-metal blank or tube length and of the type comprising an axially slotted hollow hub forming a socket for a shaft or other transmission member and having a lug depending from either side of the slot, the lugs being planar and pierced for the passage of a bolt or the like by the operation of which the clamp can be tightened to bear radially onto the shaft.
Claims11
A method of forming from a metal blank a coupling clamp having an axially-slotted hollow hub forming a socket for a shaft and lugs projecting from opposite sides of said slot, the lugs being planar and pierced by a hole for the passage of a bolt for tightening the clamp to bear radially on the shaft, the method comprising the step of submitting the inner surface of each lug to a striking operation to cause lug material to be outwardly displaced to form on the outer surface of each lug a raised boss surrounding the bolt hole and to form a recess on the inner surface of the lug.
Dependencies are inferred from the claim text.